Electric air-pump.



No. 738,532. PATENTED SEPT. 8, 1903.

- C. A. EGK.

ELECTRIC 'AIR PUMP. APPLICATION, FILED NOV. 1, 1899. RENEWED JAN. 15, 1903.

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ELECTRIC AIR: PUMP. APPLICATION FILED NOV. 1, 18981.. RENEWED JAN, 15, 1903.-

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UNITED STATES- Patented September 8, 1903.,

PATENT OFFICE.

CHARLES A. ECK, OF NEWARK, NEW JERSEY, ASSIGNOR TO THE AUTO- ELECTRIC AIR PUMP COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

ELECTRIC AIR-PUMP.

SPECIFICATION forming part of Letters Patent No. 738,532, dated September 8, 1903.

Application filed November 1,1899. Renewed January 15, 1903. Serial No. 189,163. (No model.)

To wZZ whom it may concern.-

Be it known that I, CHARLES A. ECK, a subject of the King of Sweden and Norway, and a resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Electrie Air-Pumps, of which the following is a specification.

My invention relates generally to pumps,

and more particularly to pumps that are operated by means of electricity; and its object is to provide an inexpensive and compact construction of the supporting means for the electric motor and a convenient arrangement of thelatter with regard to the pump-cylinder.

Other objects will appear farther on in the specification and to carry out these objects the invention consists in the hereinafter-da scribed means.

2c In the drawings I have shown what I consider the best means for carrying out the invention; but it will of'course be understood that changes may be made within the scope of the claim.

In the drawings, Figure 1 is a plan view embodying my invention and showing the pump-cylinder with the cover removed. Fig. 2 is an irregular sectional view on the line a: so of Fig. 1. Fig. 3 is a detail view of the pump-cylinder. Fig. 4 is a view of the upper side of the removable head of the pump-cylinder. Fig. 5 is a view of the under side of said removable head.

Similar letters of reference indicate corre- 5 spending parts in the different views.

I shall describe a support for an electric motor, a pump-cylinder, and adjacent elements embodying my invention and afterward point out the novel features in the claim.

D indicates a horizontal base portion formed with a suitable supporting portion (Z on which is fastened any suitable electric motor adapted to operate the pump by suitable 5 means, but preferably one which embodies the inventions disclosed in Patents Nos. 627,488 and 633,641, granted, respectively, on the 27th day of June, 1899, and on the 26th day of September, 1899. The base portion is further provided with the wire connectors d and has formed integral with it the vertical pump-cylinder d rising above the upper surface d of the base portion and extending below the under surface 01 down to the bottom, forming one rigid piece. This cylinder is provided with an air-inlet d from which extends a passage 01*, provided with a valveseat (2 adapted to be closed by the ball-valve d, held in position by spring (1 coiled around the spindle d of the screw-cut plug 01 inserted in the horizontally-extending boss (Z of the cylinder. From the passage (i extends a smaller passage d terminating in the hole (1 communicating at the bottom inside with the cylinder (1 From the passage (1 extends farther a passage 61 vertically up through the side wall of the cylinder up to the top of same. Further, an air-outlet E, provided with a screw-cut portion a, is also furnished in said base portion. From this extends the passage e also provided with a valve mechanism e consisting ofv a valve-seat with a ball e whose outer movement is limited by the verticallyextending screw 6, inserted through the bottom of the base portion and projecting into the passage 6 but this valve is the reverse of the one described in connection with the air-inlet, and from this passage 6 extends farther a smaller passage 6 terminating in the hole 6 communicating with the bottom of the cylinder, while a vertical passage 6 also extends from said passage 6 to the top of the cylinder 01 The cylinder 01 is provided with a removable head F, formed in the middle on its upper side with a raised portion f, having a depression forming a suitable stufling-boxf and is pierced throughout with a hole f for the admission of the piston-rod of the pump. On its lower side it is formed with a slightly-raised portion f of a diame- 9o ter equal to the diameter of the inside of the cylinder 61*. It is further formed on its lower side with a holef directly in alinement with the vertical passage (Z of the cylinder, and from this holef extends a passage also 5 containing a Valve mechanism f of the construction described in connection with the inlet-passage for the lower part of the cylinder,

the head F being also provided with bosses al similar to that of the cylindrical portion,

I and this passage j" communicates by means of the passage f and the holef with the inside of the cylinder (1 at its upper end. Likewise a hole f registering with the vertical passage 6 of the cylinder, is also provided and communicates, by means of the passage f havinga valve f interposed, and passage f with the outl-etf communicating with the inside of the cylinder d at its upper end.

The head may be fastened to said cylinder by' any suitable means, such as screws or the like. The spring actuating the ball-valve has been omitted in several instances in order to avoid confusion.

From the above it will now appear that when the pump is operated by the motor through suitable intermediate means air will be drawn in through the inlet d passage (1 past the valve at, through passage (Z and hole d into the cylinder 01 on the lower side of the piston, the outlet-passage 2 being closed by valve 6 during the operation. At the same time air will pass from the cylinder on the upper side of the piston into the hole f through passage f passage f past the valve f, and into the holef communicating with the vertical passage 6 which extends down to the passage e and out through the outlet E. The valvef it will be understood, is also closed during this operation.

When the piston is on the downstroke, the valves d and f will be closed, While the air will be exhausted from the cylinder on the lower side of the piston through the hole 6, passage 6 past the valve 6 through passage e to the outlet E, and the air introduced into the cylinder on the upper side of the piston through inlet (1 passage 61 to passage (Z up to the hole f in the head of the cylinder, through passage f past valve f through passage f and hole f in the head of the cylinder, which hole f communicates with the inside of the cylinder on the upper sideof the piston.

It will thus be seen that by my improvevsatse ments I have produced a mechanism efficient, compact, and in every way suited to the purpose for which it was devised.

Having thus described myinvention, what I claim is- In an electric air-pump, the combination of a horizontal base portion, a vertically-disposed hollow cylindrical portion closed at the bottom, formed integrally with the base portion, and extending downwardly below and upwardly above the surface of the latter, a removable head for said cylindrical portion adapted to close its upper end, two vertical passages in the wall of the cylindrical portion, two horizontal passages perforating the base portion and. extending into the cylindrical portion at its lower end and communicating therewith, one forming an inlet and the other an outlet and communicating also with the vertical passages aforesaid, two horizontal passages in the removable head communicating with the cylindrical portion at its upper end and with the vertical passages in the wall of same, forming an inlet and outlet for the upper end of the said cylindrical portion, two horizontal bosses formed on the removable head and a horizontal boss formed on the cylindrical portion below the CHARLES A. ECK.

Witnesses:

OTTO FRIDLUND, AXE'L V. BECKER.

day of Oc- 

